Home / 20,891.38-28,831.94-11,461.77

Finding the Fourth Proportional to 20,891.38, 28,831.94 and 11,461.77

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Solution

The fourth proportional to 20,891.38, 28,831.94 and 11,461.77 is: 15,818.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.38 : 28,831.94 = 11,461.77 : x
  2. Step 2: Convert to fraction form
    20,891.38/28,831.94 = 11,461.77/x
  3. Step 3: Cross multiply
    20,891.38x = 28,831.94 × 11,461.77
  4. Step 4: Simplify right side
    20,891.38x = 330,465,064.93
  5. Step 5: Solve for x
    x = 330,465,064.93/20,891.38
  6. Step 6: Final answer
    x = 15,818.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.